Segment Information - Other Reconciling Items (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Net Sales		$ 14,121	$ 13,680	$ 12,670
Equity Income		75	1,484	22
Total assets		9,158	10,778	10,261
Depreciation		298	285	295
Amortization		52	45	37
Capital Expenditures		227	260	326
Purchase accounting amortization		2	$ 5	3
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration]			Restructuring and impairment costs
RUSSIAN FEDERATION
Segment Reporting Information [Line Items]
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)		1
Asia
Segment Reporting Information [Line Items]
Loss on Contract Termination		7
Yanfeng
Segment Reporting Information [Line Items]
Equity method investment, realized gain (loss) on disposal			$ 1,181
Gain on completion of transaction				12
SJA
Segment Reporting Information [Line Items]
Equity method investment, realized gain (loss) on disposal	$ 33		33
YFAS
Segment Reporting Information [Line Items]
Gain on completion of transaction			5
YFAI
Segment Reporting Information [Line Items]
Purchase accounting amortization		2	5	3
Restructuring charges		1	1	8
(Gain) on sale of / impairment of nonconsolidated partially owned affiliates		10		231
Impact of tax reform				1
Reportable Segments | Americas
Segment Reporting Information [Line Items]
Net Sales		6,557	6,164	5,889
Equity Income		0	(1)	1
Total assets		3,073	2,888	3,019
Depreciation		130	121	128
Amortization		12	13	13
Capital Expenditures		104	131	138
Reportable Segments | EMEA
Segment Reporting Information [Line Items]
Net Sales		4,764	5,564	5,148
Equity Income		12	7	8
Total assets		2,166	2,473	2,658
Depreciation		116	132	129
Amortization		4	14	8
Capital Expenditures		73	104	164
Reportable Segments | Asia
Segment Reporting Information [Line Items]
Net Sales		2,926	2,123	1,822
Equity Income		76	265	256
Total assets		2,959	3,187	2,868
Depreciation		52	32	38
Amortization		36	18	16
Capital Expenditures		50	25	24
Reconciling items
Segment Reporting Information [Line Items]
Equity Income		(13)	1,213	(243)
Total assets		960	2,230	1,716
Depreciation		0	0	0
Amortization		0	0	0
Capital Expenditures		$ 0	$ 0	$ 0